Grinding-tool.



M. F.'PARSONS.

GRINDING TDOL.

APPLICATION FILED DBO. 3. 1909.

K Patented May 3, 1910.

2 EEEETS-SHEET L .M. F. PARSONS.

GRINDING TOOL.

v APPLICATION FILED mug, 1909.

I Patented May 3,1910.

B SHEETS-SHEET 2.

dart/Lam r. 1 'rr s das;ior Kansas orrY, Kansas.

Specification of Letters Patent.

Patented May 3, 1910.

App1icatio'u ii le'd December 3,;19099 Serial No. 531,233.

. To all whom it may concern:

Be it known that I, MILLARD .FI Parsons,

a citizen of the United States, residingat' Kansas city, in the county of ,W andotte and State of Kansas, have invente certain new and useful Improvements in Grinding- 'l ools, -Z of which the following is a specificatlon.

This. invention relates to grinding-tools and is designed especially for usejin grindmg'the puppet valves and valve seats, of vgasolene automobile engines, though adapted-foruse in other connections, and m obje'ctfis to produce a toolof this character which canbc easily and efiiciently operated .by an unskilled personf 3 A-furtherobiect isto produce a grinding tool which wil impart an oscillatory motion -to the valve; similar to that produced 20. in grinding b hand. I i A stilliu'rt tor-object is toprotlucea tool I fiby which a valve may be oscillatedand v r -causd to continuously turn around its -a x 1 s at a -mfrchslower speed than and without anterfenng -w th its oscillatory movehe grinding of a valve and its seat wit out h tting the tool by hand during such op- "eration. y.

others as hereinafter appear, the 'invention consists in certain novel and peculiar-fem ereneeis to bead to t e accompanying;

drawings,'in which;

Figure 1, is an elevation etagrinding 1 tool embodying my invention. Fig-2, is a 49 section on the line II'II of Fig.1, and i also shows a part of a breast-drill for o geratin the tool. Fig. 3, is a s'ectionon t e line I IIII of Fi 2. Fig. 4, is.a section on the line IV-I of Fig. 2. Fi .1 5, is a vertical section of the lower en of the oscillatory shaft of the tooland of'the upper end of aspanncr for. engagement with certain kinds of valves. Fig. 6, is a central.

vertical section of a tool equipped with means whereby the'valve is.given a continuousrotary movement and at the same time an oscillatory'movement. Fig. 7, is a sectien pn'the line VII-VII of Fig. 6. 1 In""the saidjd'rawings, where like refer- 5 dnee characters identify corresponding "arts in all of the figures, 1 indicates a' cylin rical v jj l t and thus adapt'thetool to cmn lete" 3'0 ith' these general "objects in 'view and casing provided eccentrically with a depending bearing-boss 2 for a vertical shaft provided at its lower end with a tongue 4.

5 is an internally-threaded knurled nut fitting loosel on the shaft 3, and 6 is a collar secure by a pin 7 on said shaft and underlying a part of the knurled nut to prevent the same slipping off the 'end of the shaft.- 5

8 is a bit, iuthe form of a screw driver or. s'panner, provided with a threaded head 9 having a socket or recess 10, the latter being adaptechto receive the ton ue i, after which the nut is screwed upon 1 18 threaded head to hold the bit in fixed relation to the shaft, and secured rigidly on the upper end of the said-shaft Within the casing, is an arm 11 provided with a radial bifurcation or slot 12. i J 13 is. a..cap for and secured by bolts ld to the casing 1, and projecting upward from said cap is a hearing-boss 1.5 for-avertical shaft .16 arranged verticallyabove and extending in 'alinement with shaft 3,-an('l se 30 :cured on the-lower end of-shaft 16 within the casing is a gear-wheel 17 meshing with "a similargear-wheel 18' provided with a pin '19 engaging the bifurcation or slot 12 --0f v arm-11. .The gear-wheel 18 is secured upon 35 the lower end of a short shaft or stem 20 journaled intlle bearing-Miss 21- projecting vertically upward .fro'm the cap, and resting upon the boss and secured to the upper end of said shaft. or stem, is a collar 22. I

' From the foregoing it will be apparent that rotary movement imparted .to shaft-16 will result in oscillatory.unovement of the bifurcated arm andj hehce produce similar movementof the bit or spanner.

In 'the consfruetionjshown byqsheet 1, .the means for imparting movement to. the shaft 16 is'a common breast-drill o f which 23 forms the chuck-for engagemenflwith the shaft and 24 the casing forthe-stem-or mandrel of the chuck, and to hold the breastdrill in roper relation to the tool, I-pro-' vide a c' ainp 25, the same consisting of members 26 and 27 bolted together and upon the casingof thebreast-drill, and said clamp is connected by a link 28 with the cap 13, said. link'c0ns1sting of a pivoted frame 29 and a rod 30 slidable therein and ada ted to be secured in fixed relation thereto .y aset-screw 31. The u per end of the link is pivoted at 32 to rnemher 27 of the clamp and the lower end of the link is pivotally mounta in or remove it from position it is necessary to d1sconnect member 26 of the clamp,vas

ed on a rod 33 carried by cars 3i projectin up'ward, from the cap To place the dr1l will be apparent -Where it is desired to impart a continuous progressive rotary movement to the valve'fwithout interfering with its oscillatory movement, the gear-wheel 18 is caused to travel as a planet gear around gear-wheel 17 as the sun ear, the said result being cfthe-idler gear-wheel with said internal gear-wheel, the arrangement bein such-thatf fected from siaft 16. My preferred concuredutoefiange 35, and 39 isa gear-pinion.

secured upon shaft 16 and connected through movement imparted to the shaft 16- shall resultin rotary movement of gear-wheel 38 and hence caiis'ethe casing to rotate around shaft-'16 and gear-wheel 18 to be not only rotatedby gear-wheel 17 but also to travel as a planet around the periphery ofthe I same, the parts being so roportioned that the last'named action resu ts 11'1 a-slow progressive rotary movement of shaft without interfering with its comparatively rapid oscillations. The idler gear-wheel 40 is journalcd on the lower, end' of a stub-shaft 41 secured to and depending from a part 42 journaled on shaft 16, and said part is pro- -vided with a handle 4 3 by which 'it may be held immovable. It is also provided atthe opposite side of shaft 16 from said handle with bearing-aims 44 for a short drive-shaft 45 equipped with a crank handle 46 at. its outer end and at its inner end with a bevel gear 47 meshing with a bevel gear 48 on the upper end of shaft 16. It will thus be seen that by grasping handle 43 and holding the part 42 stationary, the operator may turn the crank handle and thus impart to the shaft 3 the movements above traced.

The common method of grinding a puppet valve, such as valve 49, is to raise it slightly from itsseat 50 and introduce an abrasive substance, such as emery, between it. and'its seat, and then by means of'a screw driver or a spanner, impart oscillatory movement to the valve, and at intervals turn the screw driver so that the grinding of both the valve and its seat shall be uniform, which method is slow and tedious.

With my device an expansive ,spring 51 is ceases v first arranged under the valve to yieldin 1y I hold the latter slightly above its seat. he

.tool is then engaged with the nick or slot commonly found m'the top of the valve or with. the two holes which are sometimes found in the valve ipstead of the nick or slot. In the first case a. bit like thatshowh .in 1, 2 and 6. is employed; in the secon case a spanner, as shown in Fi "Vit-h the tool of the type shown by igs. Y

1 and'fl, a movement of the valve is'produced repl'sely like that which is accomplished y the hand-manipulation referred to, the

- tool at intervals being turned for the same reason that the screw diiver orspanner is turned by-hand, that is to insure uniform grinding of-the valve andits seat. With the construction shown by Fig. 6,-that is where the gear-wheel 18 is caused to revolve as a. planet around the gear-wheel 17 as the sun, a constant progressive rotary movement is imparted to the valveautomatically so as to obviatethe necessity of turning the tool at intervals as is necessary with the constructionj, shown by Figs. 1 and 2 it" being immaterial .whether the shaft 16 "is driven throng 1 the instrumentality of a breast-drilh'a'fcrank handle as in in any other'manner,

It will be apparent of course that the-use of the spring 1.5-1 under the valve is'notabsgilute'ly indis e'nsable but that it is referred to use it wit r either type of the .too andjhat Fig. 6, or.

a slight downwardpressure imposed upon the latterfyvillIbe sufficient to cause/said spring toyild and thus insure.'the -grinding operation, in fact thewcight of the tool may be-sutlicicnt'to hold the-valve uponits seat with sullicienhpressure for th e- 'gri n d 1- ing operation 'to be performed, the tool be a s to permitthe spring ing raised at interv t'o' elevatetthe valve sufiicien'tly forfthe -insertion of additional" abrasive material be= not employed it is necessary to raise the valve by hand.

, From the above descri tion it will be apparent that I have prot need a rinding tool embodying the features of-a vantage.

enumerated as desirable in the statement of tween it 'and" its seat. \Vhereithe spring is the objectof the invention and which is susceptible of modification in various par:

and scope or sacrificing any tages of the appended claims. I

Having thus described the tor-y shaft, a shaft in line with the oscillatory shaft, a'shaft out, of alinement with the ticulars Without, departing from vthe spirit of. the advan- 1 'nventin what f' '1 claim as new and desire'to secure by Let-- tiers-Patent, is: r :7 f1. A grinding tool, comprising an'oscilla,- 5

first-named shafts, means far rotating, the

shaft in 'alinement'witli thc oscillato shaft shall cause the said third shaft totravel shaft, means whereby the rotation of'sai almed I tory shaft, an arm projectin .2

" igalinement with in a circle around the axis of said alined shaft, means whereby said'alined shaft shall impart rotation to said third shaft without interfering with its circular travel, and

means whereby said third'shaft shall impart alined shaft without .interferi'ng'with therotation of each around its own axis.

'3. A grindlng tool, comprising an'oscllla- -rotary wheel disposed with ,ltS axis out of that of said shaft, means whereby the -.rptation of said wheel shall e ect oscillator movement of said shaft, a shaft alined with the oscillatory shaft and v p vided with a gear-wheel .meshing with.

"1th rst namedgear-wh'eel, means for imin'g movement to the said Mined-shaft,-

P a gear-wheel arranged concentrically with "respecttothe axis of said alined shaft,

"means whereby the rotation of the last- )nam'ed shaft shall impart rotation to the last-named' gear-wheel, and means whereby the rotation of said last-named gear-wheel "shall cause the gear wheel connected to im- 40 part oscillatory movement to said oscillatory shaft, to travel as a planet-gear around the gear-wheel-intermeshing with and driving the same. 5 a v t 4. A grinding tool, comprising a casing provided with a pair of vertically alined bearings and a third bearing eccentrically of the first-named bearings, shafts journaled the casingat their adjacent ends, a parallel in said alined bearings and projecting into shaft journaled in the third bearing, gearwheels mounted upon one of the first-named shafts and the third shaft and meshing together, a pin projecting from the gear-wheel on the third shaft parallel with the latter, an arm rigidly mounted on the first-named shaft notprovided with a provided with a longitudina slot receiving saidpin, a gear-wheel bearing a fixed relashaft journaled in said part and means for causing the gear-wheel.

therefrom, a

vide equipped with the slotted arm.-

In testlmony whereof I afiix mysignature, in the presence of two witnesses.

ear wheel and tion to the casing and arranged concentrically around one of 1 the said first-named shafts, a gear-pinion mounted on the firstnamed shaft surrounding the said gearwheel, a frame journaled on the shaft provided with the gear-pinion, an idler gear-' wheel meshing with the said gear-pinion and said surrounding gear-wheel, a part .journaled upon theshaft provided with the pinion and provided with a stub-shaft formlng ajournal for said idler 'gearwheeh'a with a crank handle at one-end an a miter gear at the other, and a miter gear secured upon the upper end of the shaft provided with a gear-pinion and meshing with the first-named miter gear.

5. A grinding tool, comprising a casing provided with a pair of vertically alined the first-named bearings, shafts ournaled in said alined bearings and projecting into-the.

casing at their' adjacent ends, a' parallel rovided:

', bearings and a third bearing eccentrically of sol I shaft journaled in the third bearing, gear:

wheels-mounted upon one of the first-named shafts and the third shaft and meshing together, a pin projecting from the gear-wheel on the third shaft para lel with the latter, an

arm rigidl mounted on the first-named shaft 1 (provi ed with -a gear-wheel.and'= pro v with a longitudinal slot forrejceiving not said pin, a gear-wheel bearing a fixed'jrel ation to the casing and arrangedconcentricf ally. around one of the said "'first named shafts, a gear-pinionmounted on the firstnamed shaft surrounding the said gearwheel, a frame journale'd on the shaft provided with the gear-pinion, an idler gearwheel meshing with the said gear-pinion and said surrounding gear-wheel, a journaled upon the shaft provided withthe inion and provided with a stub-shaft formpart mg a journal for said idler gear-wheel, 3':

shaft journaled in said part and provided with a crank handle at one end and a miter gear .at the other, a mitergear secured upon a the upper end of the shaft provided with a gear-pinion and meshin with the first- 'named miter gear, and a it carried by and the shaft in longitudinal alinement with 'MILLARD r. PARSONS. Witnesses:

G. Y. Trronrn, HELEN C. Romans. 

